feat:自動でvalidationするCIを追加

.github/workflows/validate-renovate-config.yaml

@@ -0,0 +1,46 @@
+name: Validate Renovate Config
+
+on:
+  pull_request:
+    paths:
+      - "renovate-bot.js"
+      - "renovate/**"
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Validate renovate-bot.js
+        if: ${{ exists('renovate-bot.js') }}
+        run: |
+          npx --yes renovate-config-validator renovate-bot.js
+
+      - name: Validate renovate directory configs
+        run: |
+          find renovate -type f -name '*.json' -exec npx --yes renovate-config-validator {} \;
+
+      - name: Post success comment on PR
+        if: success()
+        uses: actions/github-script@v7
+        with:
+          script: |
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: 'Renovate設定ファイルのバリデーションに成功しました :white_check_mark:'
+            })
+
+      - name: Post failure comment on PR
+        if: failure()
+        uses: actions/github-script@v7
+        with:
+          script: |
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: 'Renovate設定ファイルのバリデーションに失敗しました :x: 詳細はActionsのログを確認してください。'
+            })